Driver fob mill-spindles



JOSEPH MCOONNELL, OF NEW BRIGHTON, PENNSYLVANIA.

DRIVER FOR MILL- SPIN'DLES.

Specification of Letters Patent N 0. 5,074, dated; April 17, 1847.

To all whom, it may concern:

Be it known that I, JOSEPH MoCoNNELL, of New Brighton, in the county of Beaver and State of Pennsylvania, have invented a new and Improved Instrument, usually called a Driver, for Driving Millstones; and I do hereby declare that the following is a full and exact description. i

To enable others skilled in the art to make and use my invention I will proceed to de scribe its construction and operation.

I construct my mill spindle and mill stone in the usual forms, but in order to obviate the difficulty of fitting the common driver so as to hold the face of the upper stone perfectly parallel to the bed stone and also to avoid the necessity arising from the usual mode of constructing drivers, of always keeping the spindle exactly perpendicular with the face of the bed stone.

I construct my driver of cast or wrought iron in two pieces, one of which marked A, in the annexed drawings is well fitted to that part of spindle usually called cockhead immediately above the collar to which piece of metal marked B, in the annexed drawings which is so-constructed as to slide freely endwise without being attached to or obstructed in its motion endwise by the cock head. My second piece marked B, extends across the eyes of the stone but instead of driving by its parallel sides like the common driver it drives by its mitered ends.

What I claim as my invention and desire tosecure by Letters Patent is The construction of a driver made in two pieces attached to each other by a sliding dovetail or feather, which while one piece is firmly attached to the spindle the other is so constructed as'to slide freely endwise so as to allow the top stone to keep its parallel with the bed stone whether the spindle is perpendicular with the same or not.

JOSEPH MQCONNELL.

Witnesses:

J OSEPH R. MARTIN, DAVID MOCONNELL.

is attached by a sliding dovetail a second 

